(A) Noise. At points of measurement stated in § 156.644 of this chapter, the maximum sound pressure level radiated in each standard octave band by any use or facility (other than transportation facilities or temporary construction work) shall not exceed the values for octave bands lying within the several frequency limits given in Table I, after applying the corrections shown in Table II. The sound pressure level shall be measured with a sound level meter and associated octave band analyzer conforming to standards prescribed by the American Standards Association. (American Standards Sound Level Meters for Measurement of Noise and Other Sounds, 224.3-1944, American Standards Association, Inc., New York, N.Y., and American Standard Specification for an Octave-Band Filter Set for the Analysis of Noise and Other Sounds, 224.10-1953, or latest approved revision thereof, American Standards Association, Inc., N.Y., N.Y., shall be used.)
Table I | |
Frequency Ranges Containing Standard Octave Band in Cycles per Second | Octave Band Sound Pressure Level in Decibels re: 0.0002 dyne/cm2 |
Table I | |
Frequency Ranges Containing Standard Octave Band in Cycles per Second | Octave Band Sound Pressure Level in Decibels re: 0.0002 dyne/cm2 |
0 to 74 | 69 |
75 to 149 | 54 |
150 to 299 | 47 |
300 to 599 | 41 |
600 to 1,199 | 37 |
1,200 to 2,399 | 34 |
4,800 and above | 28 |
Table II | ||
Type or Location of Operation | Correction or Character of Noise in Decibels | |
1. Emission only between 7:00 a.m. and 7:00 p.m. | +5a | a. Apply one plus correction only |
2. Noise source operated less than 5% of any 1-hour period | +5a | |
3. Property is not located in one of the R Districts and is not within 500 feet of any R District | +5a | |
4. Noise of impulsive character (hammering and the like) | -5b | b. Apply one minus correction only |
5. Noise of periodic character (hum, screech and the like) | -5b | |
(B) Vibration. No vibration (other than from transportation facilities or temporary construction work) shall be permitted which is discernible without instruments at the points of measurement specified in this section.
(C) Odors.
(1) No emission of odorous gases or other matter shall be permitted in such quantities as to be readily detectable when diluted in the ratio of one volume of odorous air to four of clean air at points of measurement specified herein, or at point of greatest concentration.
(2) Any process involving creation or emission of any odors shall be provided with a secondary safeguard system, so control will be maintained if primary safeguard system should fail. (There is hereby established as a guide in determining such quantities of offensive odors Table III, “Odor Thresholds”, in Chapter 5, Air Pollution Abatement Manual, Copyright 1951, Manufacturing Chemists’ Association, Inc., Washington, D.C., and said manual and/or table as subsequently amended.)
(D) Glare. No direct or sky-reflected glare, whether from flood lights or from high temperature processes such as combustion or welding or otherwise, shall be permitted to be visible at the points of measurement specified herein. This restriction shall not apply to signs or lighting of buildings or grounds for protection as otherwise permitted by the provisions of this subchapter.
(E) Fire and explosion hazards. All activities involving, and all storage of flammable and explosive materials, shall be provided at any point with adequate safety devices against the hazard of fire and explosion.
(F) Radioactivity or electric disturbances. No activities shall be permitted which emit dangerous radio-activity at any point, or electrical disturbance adversely affecting the operation of any equipment other than that of the creator of such disturbance.
(G) Smoke. No emission shall be permitted from any chimney or other source, of smoke or gases, except in accordance with air pollution provisions of the state’s Board of Health.
(H) Fly ash, dust, fumes, vapors, gases and other forms of air pollution. No emission shall be permitted, except in accordance with air pollution provisions of the state’s Board of Health.
(I) Liquid or solid wastes.
(1) No discharge at any point into public sewer, private sewage system, public storm drain, stream or into the ground shall be permitted, except in accordance with the standards approved by the state’s Department of Health or standards equivalent to those approved by such Department.
(2) No materials or wastes shall be deposited on any property in such form or manner that they may be transferred off the property by natural causes or forces, and any wastes which might be attractive to rodents or insects shall be stored outdoors only in closed containers.
(Prior Code, § 29.35.060) Penalty, see § 156.999